Shaft-packing.



No. 853,506. PATENTBD MAY 14, 19o?. l

v .A.H.BDDY.

SHAFT PACKING.

APPLICATION FILED JULES, 190B.

UNITED srA'rss PAfrnNroFFioE.

ARTHUR H. EDDY,

I TO (,IlAltbE QF WINDSOR, CONNECTICUT, ASSIGNOR 0F UNE-HALF S E. SIIEPAKD, 0F IIAR'IFORD, (.()NNE()TI.(l.l'l`.

SHAFT-PACKING.

Specification of Letters Patent.

Patented May 14. i907.

Application tiled July 3,1906. Serial No. 324,589.

To (ell whom, it ln/n4] concern/.-

Be it known that I, An'ruuu il. EDDY, a citizen .of the United States, residing at Windsor, in the coun-ty of liartford and State of Connecticut, have invented a new and useful Shaft-Packing, of which the following is a specification. A

, This'invention relates to a means for packi ing a rotatory shaft or arbor which extends containing liquid under considerable presw sure such, for instance, as thc rotatory shaft.'

tion of the cam-case, the cam cylinder in the lcase, the gear outside of the ease and the shalt Wbleh extends through the case and I I ground hard steel bearing ring cylinder or arbor ofan ammonia pump of the. class j shown and described in the. United States -viously been deemed absolutely Patent`No. 815,911, issued to me `\lareh-20,

The object of thc'invention is to provide a @means for packing the joint between the shaft fand the bearingA which will have long life and always be sufiioiently tight to prevent leakcasing without ,exerting a great amount "of friction.

This invention obviates the necessity of making the parts as closely iitting ashes prerequisite,

-' and permits the flow of just enough oil to j properly lubricate the bearing and reduce thc ts'ho ulder on friction to a. minimum. It also allows the escape of fluid from the interior should an ex- 'eess of pressure arise from any cause in the.

casing, which feature may be utilized for' cleaning out any fine grit that might work down into the joint between the shaft and its bearing, I'

This invention is embodied in an organization having arotatory shaft supported by a suitablebearing and havingA a hard collar arranged to rotate lwith the shaft near one end of the bearing and-a cushioning packing held against the joint between the collar and a I 'so that it will come and go under varying conditions and still keep the joint tight.

. A' The invention is illustrated in the accompanying drawing as applied to the ammonia .pump described in the patent above referred yto and thel View shows a central vertical 'secthe shaft with a yielding pressure joins the eam-cyliinler andthe gear of that pump,

The case 1 illustrated is preferably a cylinder of east iron having an integral hub 2 e. tending 'dowlnvardly from itsv bottom. A is desirably arranged so as to be adjustable in the interior of the case. for supporting the corresponding bearing ring i in the bott-om of the. cam ln the opening through the hub it is desirable to fix a hard sleeve t which-is slightly shorter than the hub so as to leave a recess at the lower end. Extending through and fitting the sleeve so it. may rotate freely is a shaft 7. The cam cylinder in thecase is secured to the. upper end of the shaft andthe gear S below the case is secured to the lower redueed endv ofthe shaft.

Fitting the. shaft near the shoulder caused by the reductii'in in the. diameter of the shaft is a ground ring i). Thisring occupies the' recess in the lower end of the hub and rotates with the shaft against the ground lower end of the sleeve that extends` 'through the hu'b. (hi the reduced portion of the shaftis a pack'- ing case 1() containing a cushioning packing' 1l that is arranged toe-lose the joint between the sliaft and the ring that rotates with it This packing ease is held up for the, pur )ose of causing the packing to perform'its wor c by plungers 1'. arranged in sockets in thel hub of the gear, the plunge-rs being thrust upwardly from thei sockets by-springs 13. There. may be six or eight of these spring plungers, if desired. The strength of' these springs is such as to holdup the packing with the tension necessary to overcome the maximum pressure of the iluidwitliin the ease. For instance, if the maximum 'pressure desired in the. case is sixty'pounds per square inch 4the springs are of such st itfness that tl-iey will hold up the packing with a foreeeoual to the pres sure. of sixty pounds per square inch on the packing. o I

When the gear rotates the shaft andthe cani-cylinder, the plungers, packing-ease, packing and ring rotate with the shaft. The ring is pressed up against the, lower end of the bushing with a yielding force se thatthe friction between the rotating parts, that is,

tending from theinterior to 'theuexterior of ring on the lower end of the larger part of the shaft. Just enough oil will ooze out between the face of the ring and the end of thebushing to lubricate these surfaces and this is caught by the recess in the gear but .it amountsto a v ery small quantity during a long period of, time.

In this construction the elastic Vor cushioning packing is arran red to packthe-joint between the shaft an( the ring which rotate together so that there is no fri'ctional wear on this packing and there can Ibe soine come and go of the shaft without any leakage. Should the pressure in the caseforanv cause rise above the inaXi-inuin the excess will force the packing down and peri'nit :fthe oil to csfape and thus relieve the pressure. t

W'ith this constructi `in itis not as necessary to adjust the supporting'rings to assure an exa-ct distance between they plane of the rings andthe plane of the end-of the sleeve for thecushioning packing permits of some variation; and by reason ofthe use of this form of packing it is not necessary for the shaft to fit the sleeve soy tightly as to cause an undue amount of friction.' If anyY fine grit should work down betweenthe shaft and `the sleeve it can be flushed outwithout dismantlin the machine by simply. causing an excess o pressure in the case and forcing the oil out past the-packing.

The invention claimed. is

1., The .combination of a case, ashaft extending from the interior to the exterior of the case, a packing covering theouterend of the joint between and thrusting against both the shaft and its bearn in ,thecasefand springs thrusting the lpac ing longitudinally of theshaft against the shaftiandiits bearing each side of the j'in't between them, subst antially as'speciie'd. l

2. The combination of-a caseza shaft exthe case, aring on `the shaft at theouterend of the joint between the shaft. and its bearing in the case, acushioning packing covering,

the joint between and thrusting against both t the ringand the shaft, and springs thrusting .f l

3. The combination of a rase, a shaft ex.-

tending from the interior to ,the exterior of the case, a ringon the shaft at the` outer end of the joint between lthe shaft and its bearing in the case, Aa cushioning packing covering the joint between and thrusting against both the ring and the shaft, a case supportingv the.

packing, and springs thrusting the case-and' packing longitudinally of the shaft and against the shaft and the ring each side of-thtl joint between them, substantially as specified.

4. The combination of a case, a bushing extending through the case, a shaft extending through the bushing, a ring on the shaft at the outer end of the bushing, a cushioning thrusting against both the ring' and the. shaft, and lsprings thrusting the packing longitu- .packing covering the joint between andy4 dinally of. the shaft and against both the Y' shaft and the ring each side of the joint be-4 tween them, substantially as speciied. A 5. The combination of acase, abushing ex-ft tending through the case, a shaft extendingj both thering and the shaft,' and springsshaft anlagainst both the shaft andthe ring each side of the joint between them,fsubstan g tially as specified. Y

6. The combination of a case, a shaft- 'e'xv-ktending from the interior to the'exter'ior of the case, a packing covering the outer endof the jointlbetween and thrusting against boththe shaft and'its bearing in the case, a cani-v cylinder'attachedt'o the shaft in thecase, aV

gear attached lto the shaft outside of the case]l and springs carriedv by the gear and tliriistin"H Y the packing lon .itudinallyfo'f the shaft and against the sha tand its bearing,A substaiie` t-i all v as specified.

llVitnesses ETHEL M. LOWE, 111. W iLLiAus through the bushing, aring on the shaftiand. occupying avrecess' in the case at the outer vr; end ofthe bushing, a cushioning packing (lov-' ei'iiig the joint between and thrusting against '95'` I' thrusting the packing longitudinally l"ofthe y' 

